html {
  font-size: 100%;
  height: 100%;
}

body {
  height: 100%;
  min-height: 100%;
}

.parentBox {
  widows: 100%;
  height: 100%;
}

.subBox {
  background-color: #F4F4F4;
  position: fixed;
  _position: absolute; /* hack for IE6 */
  z-index: 1;
  top: 50%;
  left: 50%;
  margin: -141px 0 0 -201px;
  width: 400px;
  height: 280px;
  border: 1px solid #CCC;
  line-height: 280px;
  text-align: center;
  font-size: 14px;
  overflow: hidden;
}
